• Performing an air calibration in the presence of gas will decrease the bar meter.
• For excessive temperature/humidity changes, the bar meter may increase.
• When the mode is switched from the differential mode to the concentration measuring mode,
check the atmosphere for freshness and perform air calibration again in the measured
atmosphere.
• The gas concentration is displayed in six levels (without a unit).
• Air calibration is performed automatically and it cannot be performed manually.
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